CN111263677B - Welding assembly, welding device and method for welding - Google Patents

Abstract

A welding assembly (104) is described which is designed to be positioned in series between a first roll (101) and a second roll (103) of an apparatus (100) for welding H-shaped steel beam of first flange (6), web (7) and second flange (8), wherein the welded assembly is designed to rotate 180° about itself about relative vertical axes , in this way to receive the web (7), the first flange (6) and/or the second flange (8) from the first roller (101) and from the second roller (103). The invention also relates to a related device (100) for welding and a method for its operation.

Description

Welding assembly, welding device and method for welding

technical field

The invention is applicable to the field of submerged arc welding. More specifically, the present invention relates to an automatic submerged arc welding equipment for the steel structure industry.

In more detail, the invention relates to a device for welding steel beams with T or H profiles.

Background technique

Equipment for welding H-beams currently exists on the market which incorporates several devices so that a gantry crane must be used in almost all stages of the process for assembling and manipulating the partially machined profiles (attached drawings 1-7).

In short, an area of approximately 400 m2 needs to be used to accommodate the plant 10 comprising: feed roll 1 with supporting cage 2, discharge roll 3, welding assembly 4, and gantry crane 5 in front of them.

In fact, for the machining of beams with an H-profile, the first flange 6 is initially positioned on the feed roller 1, the web 7 is arranged perpendicularly and centrally to the flange 6, the two elements 6 and 7 are supported The cage 2 is blocked in its mutual position and the two elements 6 and 7 slide towards the welding assembly 4 (in the direction of arrow F). When the two elements 6 and 7 slide on the feed roller 1 towards the welding assembly 4 , the welding assembly 4 performs two welds at the two joining edges between the flange 6 and the web 7 by means of the welding head 9 .

After completion of the welding of the aforementioned elements 6 and 7, the T-profile obtained in this way (comprising the individual flanges 6 and the web 7) is turned over and the attachment system 15 of the gantry crane 5 then picks up the T-profile, And it is placed again on the new flange 8 on the feed roller 1 by moving it in the direction of the arrow G opposite to the arrow F.

At this point, the above steps are repeated until the second flange 8 is welded to the web 7 along the two joint edges.

However, as well as the need for significant production space to accommodate gantry cranes and equipment, current systems present a certain degree of danger during the step for tilting the T-profile because of its complicated control.

Another risk of accidents occurs during the step for transferring the T-profile from the tilting device 11 of the outfeed roller 3 to the infeed roller 1 by means of the gantry crane 5 .

Furthermore, a disadvantage is given by a noise of more than 85 dB during the step of tilting the T-profile.

Another disadvantage is given by the wear of the tilting lever made of steel which requires frequent maintenance.

Since the movement by means of the gantry crane takes a certain amount of time, the productivity of the plant is adversely affected, with significant downtimes. A further disadvantage arises from the fact that the control of so many devices is so complex that it requires the presence of three operators on the production line.

Therefore, there is a need in the market for a welding plant for beams with H-profiles, which has a high production rate without downtimes and which allows the available production space to be optimized.

From CN104014900, CN104308333 and CN103567678 are known welded assemblies which may be considered as the closest related prior art to the subject matter of claim 1 appended hereto.

Contents of the invention

The object of the plant and method according to the invention is to overcome the above-mentioned disadvantages and to obtain a production plant and a related method which are efficient from the point of view of production time and occupied space and for the control of the risk of accidents during their use .

Therefore, the object of the present invention is a welding assembly designed to be positioned in series between a first roll and a second roll of a device for welding with an H-profile (which originates from the first roll to be welded together) first flange, web and second flange) steel beams.

The present invention provides a welding assembly which is rotated 180° about itself on a support plane (perpendicular to the support surface) about a relative vertical axis in such a way as to receive the The web, the first flange and/or the second flange of the material roll.

Preferably, the invention may include a chain operated tilting device for tilting the first flange and web over the second rollers by 180° without operator intervention by controlling and making this movement precise.

Another advantage is given by reducing the risk of noise and accidents, since the movement of the beam is controlled and precise. In addition, the present invention may also include suspension means equipped with hydraulically telescopic arms to keep the first flange and/or web suspended in position while moving after tilting.

Advantageously, this allows the centering and alignment of the web on the second flange to be performed in an easy and safe manner.

Another object of the present invention is an apparatus for welding a steel beam having an H-profile (which may be made as described above), comprising a first roll and a second roll and positioned in series between the first roll and the second roll. The above welded assembly between two rolls.

Thus, advantageously, the presence of a gantry crane can be eliminated and the beam can be moved only by means of the rollers themselves; thus with a considerable reduction in space as well as in time.

According to the invention, the device may comprise support cages for supporting and centering the web relative to the first flange, each support cage being equipped with a hydraulic clamp for its actuation. In this way, the applied force is not only greater but also uniform along the entire beam, facilitating alignment and centering operations.

Another object of the invention is a method for welding a steel beam having an H-profile originating from a first flange, a web and a second flange, said method being characterized in that it comprises the following steps:

- Receive the first flange on the first roller

– Position the web perpendicular to and centered relative to the first flange (in this case a beam is obtained with a T-shaped surface given by the first flange and the web)

- Delivery of the T-profile (in this case the term "T-profile" refers to the above-mentioned beam having a cross-section of this profile) inside the welding assembly and welding of the first flange to the web at the same time

- Rest the T-surface on the second roll

- Make the T-surface inclined 180° with respect to the horizontal plane

- Rotates the welded assembly 180° about its vertical axis

- inserting the second flange under the turned T-profile so that the web is positioned perpendicular to and centered relative to the second flange (in this way, the H-shaped beams given by the second flange and web)

- Delivery of the H-profile inside the welding assembly rotated in this way and welding of the second flange to the web at the same time.

This method advantageously allows production to be considerably reduced, eliminating downtimes due to the transport of the T-beams by means of gantry cranes in intermediate processing steps.

Description of drawings

Further features and advantages of the device and method according to the invention will appear more fully from the following description and accompanying drawings regarding preferred embodiments of the device and method given by way of non-limiting examples, in which:

- Figure 1 is a schematic front view of a production line in a first step according to the prior art;

- Figure 2A is a schematic front view of the production line of Figure 1 in a second step;

- Figure 2B is a cross-section of a detail of Figure 2A;

- Figure 3A is a schematic front view of the production line of Figure 1 in a third step;

- Figure 3B is a cross-section of a detail of Figure 3A, wherein the tilting means are shown in solid lines in the initial position and in dashed lines in the intermediate position;

- Figure 4 is a schematic front view of the production line of Figure 1 in a fourth step, wherein the welding elements in the intermediate position are shown in broken lines;

- Figure 5 is a schematic front view of the production line of Figure 1 in a fifth step;

- Figure 6A is a schematic front view of the production line of Figure 1 at a sixth step;

- Figure 6B is a cross-section of a detail of Figure 6A;

- Figure 7 is a top view of the production line of Figure 1, wherein the gantry crane and the elements to be welded are shown in an intermediate position by dotted lines;

- Figure 8 is a schematic front view of the production line in the first step according to the invention;

- Figure 9A is a schematic front view of the production line of Figure 8 in a second step;

- Figure 9B is a cross-section of a detail of Figure 9A;

- Figure 10A is a schematic front view of the production line of Figure 8 in a third step;

- Figure 10B is a cross-section of the detail of Figure 10A, wherein the tilting device and the elements to be welded are shown by solid lines in final position and by dashed lines in intermediate position;

- Figure 11A is a schematic front view of the production line of Figure 8 in a fourth step;

- FIG. 11B is a cross-section of the detail of FIG. 11A , wherein the lifting means and the elements to be welded are shown by solid lines in final position and the tilting means are shown by dashed lines;

Figure 12A is a schematic front view of the production line of Figure 8 at a fifth step;

- Figure 12B is a cross-section of a detail of Figure 12A;

- Figure 13 is a top view of the device of Figure 8;

- Figure 14 shows a first detail of the device of Figure 8 being unloaded;

- Figure 15 shows a detail of Figure 14, where the first element is loaded;

- Figure 16 shows a detail of Figure 14, where the second element is loaded;

- Figure 17 shows a detail of Figure 16 with the cage closed;

- Figure 18 shows an enlarged view of Figure 17;

- Figure 19 shows an enlarged view of Figure 18 with the hydraulic clamps actuated;

- Figure 20 shows a second detail of the production line of Figure 8, where the components to be welded enter the welding assembly;

- Figure 21 shows a third detail of the device of Figure 8, wherein the elements to be welded are in a first position;

- Figure 22 shows a detail of Figure 21, wherein the elements to be welded are in a second position;

- Figure 23 shows a detail of Figure 21, wherein the elements to be welded are in a third position;

- Figure 24 shows a detail of Figure 21, wherein the elements to be welded are in a fourth position;

- Figure 25 shows a fourth detail of the apparatus of Figure 8, wherein the welding assembly is rotated;

- Figure 26 shows a fifth detail of the device of Figure 8, wherein the elements to be welded are in the welded assembly;

- Figure 27 shows a sixth detail of the device of Figure 8, wherein the elements are welded.

detailed description

8-27 above, the apparatus 100 according to the present invention comprises: a first roller 101; a support cage 102; a second roller 103, which is preferably liftable; and a welding assembly 104, which is placed in series at the second between the first roll 101 and the second roll 102 .

According to the invention, the welding assembly 104 is capable of rotating 180° about itself about a relative vertical axis in the direction of arrow I ( FIGS. 11 and 13 ). Advantageously, this allows the welding assembly 104 to receive the series of elements 6 , 7 , 8 to be welded together from both the first roll 101 and the second roll 103 .

Advantageously, processing can be performed in one direction and in the opposite direction in this way, resulting in a significant saving in time. Preferably, the welding assembly 104 comprises a chain-operated tilting device 111 for tilting the T-profile by 180° on the second roller 103 .

Advantageously, this ensures control and precision of movement, thereby reducing the risk of accidents during tilting.

Another aspect of the invention relates to the fact that a suspension 112 equipped with a hydraulically telescopic arm can be used to hold the T-face tilted in this way in place on the second flange, in such a way as to advantageously increase the number of welds to be welded. stability of the components and minimize the risk of unbalance.

Referring to Figures 14-27, in operation, the first roller 101 is initially unloaded and the support cage 102 for supporting the web 7 in position is open (Figure 14).

The loading operation starts with loading the first flange 6 on the first roller 101 (Fig. 15).

Once the first flange 6 is in place on the first roller 101, the web 7 is positioned on the support cage 102 (Fig. 16) and they are closed (Fig. 17).

A preferred variant embodiment of the invention comprises hydraulic clamps 113 for actuating the support cage 102 in such a way that the web 7 is correctly centered and aligned relative to the first flange 6 ( FIGS. 18-19 ).

Once the web 7 is centered with respect to the flange 6, the set of elements forms a T-piece, which is inserted into the welding assembly 104, and welding of the T-piece begins (Fig. 20) while it is delivered through the weld The assembly rests on the second roller 103 and is lifted.

After the first welding step is completed, that is to say, when the T-piece rests completely on the second roller 103, the second roller is lowered downwards (Fig. 21), moving the first flange 6 into alignment with the tilting device 111. The chain 114 contacts.

When the tilting devices 111 are actuated, these are opened while the chain rotates in one direction and the T-piece initially tilts 90°, moving the first flange 6 into a generally vertical position and moving the web 7 into a substantially horizontal position in which the unwelded ends of the webs 7 are in contact with the chains 114 of the tilting device 111 (Fig. 22).

When the tilting device 111 is closed, the chain 114 continues to rotate in the same direction, thereby moving the first flange 6 upwards and the web 7 into a vertical position. Thus, the suspension means 112, preferably by means of telescoping arms 116, keep the first flange 6 perfectly horizontal and the whole T-piece slightly suspended (Fig. 23).

In this position, the second flange 8 can be inserted under the T-piece ( FIG. 24 ) and can be centered in position relative to the web 7 so as to form the H-profile.

The welding assembly 104 is rotated 180° in the direction of arrow I ( FIG. 25 ) about the relative vertical axis, in such a way as to receive the H-profile from the second roller 103 .

The H-profile can thus again be moved towards the welding assembly 104 for welding the second flange 8 to the web 7 (Fig. 26) and then rest on the first roller 101 (Fig. 27).

The described invention may thus be modified and adapted in several ways without departing from the scope of the inventive concept.

Furthermore, all details may be replaced by other technically equivalent elements.

Finally, the components used (provided they are compatible with the specific use and dimensions) can vary according to requirements and the state of the art.

Where features and techniques mentioned in the following claims are followed by reference signs, the reference signs are used only for the purpose of increasing the intelligibility of the claims themselves, and therefore, the reference signs do not in any way constitute an The explanation of each element is limited and is purely by way of example.

Claims (6)

1. A welding assembly (104) comprising two welding heads, adapted to be placed in series between a first feed roller (101) and a second discharge roller (103) of an apparatus (100) for welding steel beams having H-profiles originating from a first flange (6), a web (7) and a second flange (8) to be welded together, characterized in that the welding assembly (104) is adapted to be rotated 180 ° about its vertical axis about itself in such a way as to receive a web (7) of the steel beam from the first feed roller (101), a first flange (6) of the steel beam and/or a second flange (8) of the steel beam from the second discharge roller (103) in such a way that the welding assembly (104) is able to weld a web (7) of the steel beam from the first feed roller, a first steel beam (6) of the steel beam and then weld it with a second flange (8) of the steel beam from the second discharge roller.

2. The welding assembly (104) according to claim 1, characterized in that it comprises a chain-operated tilting device (111) for turning the first flange (6) and the web (7) 180 ° over the second discharge roller (103).

3. Welding assembly (104) according to claim 1 or 2, characterized in that it comprises a suspension device (112) equipped with a hydraulic telescopic arm for keeping the first flange (6) and/or web (7) suspended in position.

4. An apparatus (100) for welding a steel beam having an H-profile, the apparatus comprising a first feed roller (101) and a second discharge roller (103) on which a web (7) of the steel beam, a first flange (6) of the steel beam and/or a second flange (8) of the steel beam slides, characterized in that the apparatus comprises a welding assembly (104) according to any one of claims 1-3 positioned in series between the first feed roller (101) and the second discharge roller (103), the welding assembly (104) allowing welding together the first flange (6) of the steel beam, the web (7) of the steel beam and the second flange (8) of the steel beam.

5. An apparatus (100) according to claim 4, characterized in that the apparatus comprises support cages (102) for supporting the web (7) and centering it with respect to the first flange (6), each support cage having hydraulic clamps (113) for operating the support cages (102).

6. A method for welding a steel beam having an H-profile from a first flange (6), a web (7) and a second flange (8), characterised in that the method comprises the steps of:

-receiving the first flange (6) on a first roll (101);

-positioning the web (7) perpendicular to and centred with respect to the first flange (6) so as to obtain a T-profile comprising the first flange (6) and the web (7);

-delivering the T-profile inside a welding assembly (104) and simultaneously welding the first flange (6) to the web (7);

-resting the T-profile on a second roller (103);

-turning the T-profile 180 ° relative to the horizontal plane;

-rotating the welding assembly (104) by 180 ° about its vertical axis;

-inserting the second flange (8) under the inverted T-profile with the web (7) positioned perpendicular to the second flange (8) and centered with respect to it, so as to obtain an H-profile comprising the first flange (6), the second flange (8) and the web (7);

-delivering the H-profile into a rotating welding assembly (104), and

simultaneously welding the second flange (8) to the web (7).

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